Effect of limestone and dolomite flux on the quality of pellets using
DOI: 10.1016/j.powtec.2020.10.063 Corpus ID: 226333476; Effect of limestone and dolomite flux on the quality of pellets using high LOI iron ore @article{Prusti2020EffectOL, title={Effect of limestone and dolomite flux on the quality of pellets using high LOI iron ore}, author={Pallishree Prusti and Kashinath Barik and Nilima Dash and S. K. Biswal and B. …
Influence of flux additives on iron ore oxidized pellets
For roasted pellets, calcium additives can form binding phase of calcium-ferrite, and suitable liquid phase will improve recrystallization of hematite, but excessive …
Characterisation studies on swelling behaviour of iron ore pellets
Several researchers have used limestone and dolomite as the fluxing agents due to their abundant ... Extraordinary swelling of iron ore pellets during reduction was analyzed in controlled CO-CO//2 ...
Color Change in Hardened Pellets | Download Scientific Diagram
Mandal and Sinha [7] concluded that (1) It has been possible to use fluxed iron ore pellets using iron ore and lime fines as a raw material to minimize flux input in Blast Furnace as a limestone ...
Effect of Basicity on Metallurgical Properties of Fluxed Pellets with
2.1. Raw Material. The chemical compositions of raw materials use in this study consisted of 3 kinds of iron ore concentrate (the A magnetite concentrate, B magnetite concentrate and C magnetite concentrate), fluxes (limestone and dolomite), and bentonite in Table 1.The bentonite is used as binder in pelletizing, and the limestone and dolomite powder is …
Pellet and its use in blast furnace | PPT
The most common fluxing materials for iron ore pellet production are limestone (CaCO3), dolomite (Ca,Mg(CO3)2) and olivine (Mg2SiO4), but sometimes magnesite (MgCO3) is also used. • Additives …
Iron ore pelletizing
The iron is usually ground to a very fine level and mixed with limestone or dolomite as a fluxing agent and bentonite or organic binders as a binding agent. If the ore is a Hematite ore, coke or anthracite coal can be added …
Pelletization
The pelletization process is the primary consumer of binders in the iron ore industry. The selection of an appropriate binder type and dosage is of critical importance in producing good quality pellets at a reasonable price. Binders accomplish two very important functions in iron ore pelletization: .
Degradation mechanism of high alumina refractory bricks
The iron ore is first crushed into a powder, mixed with additives and a binder, and rolled into green pellets (10–15 mm in diameter) that are sintered to pellets in a furnace during pelletizing of iron ore [10,11]. The green pellets are thermally treated in the grate and rotary kiln to increase the mechanical strength [[12], [13], [14]]. In ...
On the Formation of Porosity in Fluxed Iron-Ore Pellets
Keywords: metallurgical properties, pellets, porosity, reducibility, strength, fluxes. DOI: 10.3103/S0967091222090133. Technical and economic indicators of iron smelt-ing can be improved by using oxidized pellets with increased iron content and their fluxing [1–4]. Changes in the properties of the initial raw materials and the addition of ...
Effect of pyroxenite flux on the quality and
Section snippets Experimental. The following materials were used for preparing the green pellets: Iron ore fines (−10. mm size); bentonite (−75 μm); anthracite coal (−10 mm); pyroxenite (−50 mm).. Iron ore fines, coal and pyroxenite were ground separately in laboratory ball mill to get the required fineness for pelletizing.
Effect of Adding Limestone on the Metallurgical Properties of Iron Ore
In this study, a batch of magnesia iron ore pellets was first sieved into particle sizes of 8–10 mm, 10–12.7 mm, 12.7–16 mm and 16–20 mm, and the four different size fractions were used to ...
Effect of adding limestone on the metallurgical properties of iron …
The most common fluxing materials for iron ore pellet production are limestone (CaCO 3), dolomite (Ca,Mg(CO 3) 2) and olivine (Mg 2 SiO 4), but sometimes …
A review: research progress of flux pellets and their application in
The first trial of pelletizing iron ore fines containing fluorine with addition of light burnt (incinerated) dolomite to produce MgO containing pellets was carried out on a 162 m2 belt type ...
Features of the Iron Ore Pellets Structure Depending on the
The influence of the mineral composition of the silicate bond decreases as the concentrate enrichment degree increases. Accordingly, as the iron content in the concentrate increases, the effect of pellet fluxing on their properties decreases. Iron-rich pellets are more prone to destruction in the conditions of a blast furnace or shaft …
The Influence of Bauxite on Strength of Indurated Direct Reduction Pellets
Abstract The necessity to reduce greenhouse gas emissions and fossil fuel consumption dictates the replacement of blast-furnace stage by metallization processes. Searching for solutions to improve quality of direct reduction pellets is an urgent issue. This article studies the influence of bauxite addition on the strength of iron ore pellets for …
Utilization of Hydrated Lime as Binder and Fluxing Agent for the
The limesone, dolomite, quartz sand and anthracite were finely ground separately in laboratory ball grinder to get suitable fineness for pelletizing and their size distributions are listed in Table 2.The dolomite mainly comprising of CaMg(CO 3) 2 was used to provide MgO and part of CaO for the pellets, and the MgO content in the fired pellets was …
Effect of fluxing agents on reduction degradation behaviour of hematite
During induration at a high temperature, a considerable amount of slag/melt phase forms inside the iron ore pellets, comprising SiO2, Al2O3, CaO, MgO and FeO. After cooling, the slag phase solidifies and acts as an important bonding phase in the finished pellets and influences their room temperature as well as high temperature properties, …
Understanding Pellets and Pellet Plant Operations – …
Iron ore pellets can be made from beneficiated or run of mine iron ore fines. ... Addition of lime and/or dolomite to the ore adjusts the pellets so as to have the target chemical composition. ... The …
Utilization of Hydrated Lime as Binder and Fluxing Agent for …
of the pellet feed also have significant influence on the qual-ity of green and indurated pellets. The pellet feed mainly comprises the iron ore concentrates, binder and suitable additives like anthracite (or coke breeze) and fluxing agents. In general, the types of pellets can be mainly divided into acid, fluxed and basic pellets according to ...
Improving hydrogen-rich gas-based shaft furnace direct reduction …
Fluxing agents are the main source of basic oxides in the pellets which are able to neutralize the acidic oxides of the pellets and maintain the proper basicity (CaO/SiO 2) of the pellets. Wynnyckyj et al. demonstrated that CaO can promote the formation of slag phase such as calcium silicate and calcium ferrites in pellets to provide enough ...
Utilization of Lime Fines as an Effective Binder as well as Fluxing
A laboratory study was carried out to characterize the physical, chemical and mechanical properties of lime fluxed (varying basicity 0–2) hematite iron ore pellets. Lime was used as additive as well as fluxing agent for making iron ore pellets. The effect of additives on different properties of pellets was studied. The findings show that on …
Effect of adding limestone on the metallurgical properties of iron ore
In order to produce high-quality pellets, certain additives are important. The most common fluxing materials for iron ore pellet production are limestone (CaCO 3), dolomite ... Chemistry, microstructure, and reduction characteristics of dolomite-fluxed magnetite pellets. Metall. Trans. B, 11 (2) (1980), pp. 233-243. View in Scopus Google ...
Study of Organic and Inorganic Binders on Strength of Iron Oxide Pellets
If bentonite is added to pellets, then this process starts at a comparatively lower temperature (~873 K [600 °C]) due to the presence of sodium and calcium compounds in the bentonite, which acts as a fluxing agent.[1,4] It should be noted that the iron ore concentrate was a fluxed filter cake, which contained calcium carbonate (CaCO 3) and ...
Sintering and Reduction of pellets of El-Baharia iron ore with …
In order to examine the effect of temperature on the reduc-tion of pellets of El-Baharia iron ore with4 % and 8% dolomite respectively ( pellets ( 5-7 mm), 2 L/min hydrogen flow rate), experiments were carried out at 700 – 950oC.Plots of the reduc-tion percentage as function of time are shown in Figs. 10 and 11 .
Iron Ore Pellets – IspatGuru
The term iron ore pellet refers to he thermally agglomerated material formed by heating a variable mixture of iron ore, limestone, olivine, bentonite, dolomite, and miscellaneous iron bearing materials in the range of 1,250 deg C to 1,350 deg C. Iron ore pellets can be made from beneficiated or run of mine iron ore fines.
Iron Ore Pelletizing Process: An Overview | IntechOpen
The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries. However, the content of iron in ore deposits has deteriorated and low-grade iron ore has been processed. The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. …
Effect of adding limestone on the metallurgical properties of iron …
Iron ore pellets Reduction under Load Swelling Low-Temperature Disintegration Cold Crushing Strength 1. Introduction In general, the main types of …
METALLURGICAL USES FLUXES FOR METALLURGY
molten iron and scrap in oxygen-blown processes. The electric furnace is used to make steel, stainless steels, ferroalloys, and special alloys, whereas ferromanganese is often made in blast fur- naces. Fluxes are used in all of these processes, and either limestone or lime is the major flux component with some dolomite, dolomitic
Effect of Iron Ore Pellet Size on Metallurgical Properties
Iron ore pellets are small and hard spherical particles agglomerated from a fine iron ore concentrate. They are used in the blast furnace process to produce hot metal. The diameter of blast furnace pellets is usually between 8 and 16 mm. In this study, a batch of magnesia iron ore pellets was first sieved into particle sizes of 8–10 mm, 10–12.7 …